(a) If the director makes a finding in writing with supporting facts that:

(1) Land or water resources have been adversely affected by past coal mining practices; and

(2) The adverse effects are at a stage where, in the public interest, action to restore, reclaim, abate, control, or prevent should be taken; and

(3) The owners of the land or water resources where entry must be made to restore, reclaim, abate, control, or prevent the adverse effects of past coal mining practices are not known, or readily available; or

(4) The owners will not give permission for the state or its agents, employees, or contractors to enter upon such property to restore, reclaim, abate, control, or prevent the adverse effects of past coal mining practices.

Then, upon giving notice by mail to the owners if known or if not known by posting notice upon the premises and advertising once in a newspaper of general circulation in the municipality in which the land lies, the director, his agents, employees, or contractors shall have the right to enter upon the property adversely affected by past coal mining practices and any other property to have access to such property to do all things necessary or expedient to restore, reclaim, abate, control, or prevent the adverse effects. Such entry shall be construed as an exercise of the police power for the protection of public health, safety, and general welfare and shall not be construed as an act of condemnation of property nor of trespass thereon. The moneys expended for such work and the benefits accruing to any such premises so entered upon shall be chargeable against such land and shall mitigate or offset any claim in or any action brought by any owner of any interest in such premises for any alleged damages by virtue of such entry; provided, however, that this provision is not intended to create new rights of action or eliminate existing immunities.

(b) The director, his agents, employees, or contractors shall have the right to enter upon any property for the purpose of conducting studies or exploratory work to determine the existence of adverse effects of past coal mining practices and to determine the feasibility of restoration, reclamation, abatement, control, or prevention of such adverse effects. Such entry shall be construed as an exercise of the police power for the protection of public health, safety, and general welfare and shall not be construed as an act of condemnation of property nor trespass thereon.